CN106310447B

CN106310447B - Indwelling needle

Info

Publication number: CN106310447B
Application number: CN201610711992.8A
Authority: CN
Inventors: 黄永强; 赵善铭; 梁永基
Original assignee: Dragon Heart Medical Devices Co ltd
Current assignee: Dragon Heart Medical Devices Co ltd
Priority date: 2016-08-23
Filing date: 2016-08-23
Publication date: 2022-11-29
Anticipated expiration: 2036-08-23
Also published as: CN106310447A

Abstract

The invention provides an indwelling needle comprising: a catheter holder which is composed of a main body with an inner cavity and a side pipe with a lumen connected to the side wall of the main body; the tube cavity is communicated with the inner cavity at the liquid inlet; the catheter is arranged at one end of the main body, and the infusion tube core of the catheter is communicated with the inner cavity; the isolating plug is accommodated in the inner cavity and is respectively arranged at two sides of the communication part of the tube cavity and the inner cavity in the inner cavity and the catheter; and the flow guide structure is arranged at the liquid inlet so as to enable the liquid inlet to form liquid flow towards the isolating plug. Through the setting of water conservancy diversion structure, can wash in real time and keep away from the dead space that forms between the inner chamber inner wall of income liquid mouth one side to air, blood and the remaining liquid medicine etc. of the dead space of discharging fast can prevent that the air from getting into the human embolism that causes, prevent that the blood of solidifying of dead space department from being washed into the blood vessel and causing the thrombus to block up the blood vessel, avoid the remaining liquid medicine of dead space department and the liquid medicine of new input to take place chemical reaction and reduce the drug effect, improved the guarantee to patient life safety.

Description

Indwelling needle

Technical Field

The invention relates to the technical field of medical equipment, in particular to an indwelling needle.

Background

In the medical field, as shown in fig. 1, an indwelling needle for clinical patients generally comprises a catheter 2, a catheter holder 1, an extension tube 7, a septum 3 and the like, wherein the catheter holder 1 comprises a main body 11 and a side tube 12, an inner cavity 111 is formed in the main body 11, the catheter 2 is mounted at one end of the main body 11 and is communicated with the inner cavity 111, the septum 3 is accommodated in the inner cavity 111, a liquid inlet 5 communicated with the side tube 12 is formed in the cavity wall of the inner cavity 111 at a position between the septum 3 and the catheter 2, the extension tube 7 is connected to the side tube 12 and is communicated with the inner cavity 111, and a liquid medicine in the extension tube 7 flows into the inner cavity 111 through the side tube 12 and further flows into the catheter 2 and flows into a patient through the catheter 2.

In clinical application, because the setting of certain contained angle is taken over 12 and main part 11 to the side, the lumen 121 and the inner chamber 111 that take over 12 to the side promptly are certain contained angle, so the flow direction that flows into the liquid medicine in the inner chamber 111 from lumen 121 also is certain contained angle with inner chamber 111, this just leads to the liquid medicine can't directly flow to the isolating plug 3 and keep away from in the dead space 6 that forms between the inner chamber 111 inner wall of income sap cavity 5 one side, the liquid medicine can't wash this dead space 6 in real time, thereby the air of dead space 6 department, blood or remaining liquid medicine are difficult in time to be discharged, influence medical effect, also can cause harm for the patient. For example, if the air in the dead space 6 is not discharged, the liquid medicine flows into the dead space 6 due to shaking of the indwelling needle or other reasons during the infusion process, the air will flow into the human body, causing air embolism and affecting the life safety of the patient; meanwhile, even if air does not enter the human body, if the air is seen by a patient during infusion, the patient can be scared and uneasy, and the medical effect is seriously influenced. If the blood return in the puncture process or the blood return in the indwelling process after the transfusion is finished is deposited at the dead cavity 6, the liquid medicine can not be washed, and after the blood at the dead cavity 6 is coagulated, the coagulated blood is washed into the blood vessel due to shaking or other reasons, so that thrombus can be caused to block the blood vessel, and the life safety of a patient is influenced. If the residual liquid medicine left in the dead space 6 during the last infusion is subjected to chemical reaction with the residual liquid medicine, the drug effect is reduced, and even the life safety of the patient is damaged.

Disclosure of Invention

Therefore, the invention aims to solve the technical problem of overcoming the defect that a dead space formed between the isolation plug and the inner wall of the inner cavity far away from the liquid inlet of the indwelling needle in the prior art cannot be flushed by liquid medicine in real time, so that the indwelling needle which can flush the dead space formed between the isolation plug and the inner wall of the inner cavity far away from the liquid inlet of the indwelling needle in real time by liquid medicine and reduce the harm to a patient is provided.

To this end, the present invention provides an indwelling needle comprising:

the catheter seat is composed of a main body with an inner cavity and a side pipe which is connected with the side wall of the main body and is provided with a lumen; the tube cavity is communicated with the inner cavity at the liquid inlet;

the catheter is arranged at one end of the main body, and the infusion tube core of the catheter is communicated with the inner cavity;

the isolating plug is accommodated in the inner cavity and is respectively arranged at two sides of the communication part of the tube cavity and the inner cavity with the catheter in the inner cavity;

and the flow guide structure is arranged at the liquid inlet so as to enable the liquid inlet to form liquid flow towards the isolating plug.

The lumen with the inner chamber is the contained angle setting, just side joint pipe communicates the one end orientation of going into the liquid mouth the pipe.

The flow guide structure is a liquid blocking convex block arranged on the inner pipe wall of the pipe cavity on one side, away from the isolating plug, of the liquid inlet, the surface, facing the isolating plug, of the liquid blocking convex block is a flow guide surface, and the flow guide surface and the edge, close to the isolating plug, of the liquid inlet form a flow guide port.

The flow guide surface is an arc surface, an inclined surface or a bending surface.

The liquid blocking lug and the inner pipe wall of the pipe cavity at the liquid inlet far away from the isolating plug are integrally formed.

The liquid baffle structure is a liquid baffle lug on the inner wall of the inner cavity, the liquid baffle lug faces the surface of one side of the isolating plug and is a flow guide surface, and the flow guide surface and the liquid inlet are close to the edge of one side of the isolating plug to form a flow guide opening.

The liquid blocking lug and the inner wall of the inner cavity, which is far away from one side of the isolating plug at the liquid inlet, are integrally formed.

The liquid inlet is connected with the side connecting pipe, and the liquid inlet is connected with the side connecting pipe.

The extension pipe penetrates through the liquid inlet of the side connecting pipe and extends into the inner cavity; the flow guide structure is that the extension pipe extends into the bending part of the inner cavity and faces the pipe orifice part of the isolating plug.

The pipe orifice part comprises a first extension wall which is formed at the top of the pipe wall on one side far away from the isolating plug, and the first extension wall is bent towards one side of the isolating plug.

The pipe orifice part further comprises a second extension wall formed at the top of the pipe wall on one side close to the isolating plug, the second extension wall is bent towards one side of the isolating plug, and the length of the second extension wall is shorter than that of the first extension wall.

Still including set up in on the water conservancy diversion face, follow the water conservancy diversion face orientation the reposition of redundant personnel structure that the isolating plug extends out.

The shunting structure with go into the liquid mouth and be close to form the breach between an isolation stopper side edge.

The shunting structure is a shunting shuttle.

The technical scheme of the invention has the following advantages:

1. the indwelling needle provided by the invention comprises a flow guide structure which is arranged at the liquid inlet so as to enable the liquid inlet to form liquid flow towards the isolating plug. Through the setting of water conservancy diversion structure, the liquid medicine flows in from the lumen of side joint pipe, and receive the effect of water conservancy diversion structure and make the direction of flow change in liquid entry department, the liquid stream is towards the inner chamber of isolation stopper inflow main part, spout and isolate the stopper back and flow to the pipe direction again, can wash the dead space that forms between the inner chamber inner wall of stopper and keeping away from income liquid entry one side in real time, thereby discharge the air in the dead space fast, blood and remaining liquid medicine etc. can prevent that the air from getting into the human embolism that causes, also can prevent that the coagulated blood of dead space department is owing to being washed into the blood vessel and cause the thrombus to block up the blood vessel by reasons such as shake, can also avoid the remaining liquid medicine of dead space department to take place chemical reaction with the liquid medicine of new input and reduce the drug effect, greatly improved the guarantee to patient life safety.

2. The liquid blocking lug is arranged on the inner tube wall of the tube cavity at the side, far away from the isolating plug, of the liquid inlet, the surface, facing the isolating plug, of the liquid blocking lug is a flow guiding surface, and the flow guiding surface and the edge, close to the isolating plug, of the liquid inlet form a flow guiding opening. The liquid blocking lug is arranged on the inner tube wall of the tube cavity, so that the structure and the forming are simple, the cost is low, and the realization is easy.

3. The invention provides an indwelling needle, wherein the pipe orifice part comprises a first extension wall which is formed at the top of the pipe wall on one side far away from an isolating plug, and the first extension wall is bent towards one side of the isolating plug. Above-mentioned needle of keeping somewhere is when using, the liquid medicine flows in from the extension pipe, and is blockked by first extension wall when flowing the oral area branch, the flow direction of original changes, and keep apart the inner chamber that the stopper flowed into the main part along first extension wall orientation, spout and keep apart the stopper after again to the pipe direction outflow, equally can wash in real time keep apart the stopper and keep away from the dead space that forms between the inner chamber inner wall of income liquid mouth one side, thereby discharge the air in the dead space fast, blood and remaining liquid medicine etc. simultaneously, can avoid silting up the air in the dead space, blood, liquid medicine etc..

4. The tube opening part of the indwelling needle provided by the invention further comprises a second extension wall which is formed at the top of the tube wall close to one side of the isolating plug, the second extension wall is bent towards one side of the isolating plug, and the length of the second extension wall is shorter than that of the first extension wall. Through first extension wall with the cooperation of second extension wall, can guide the liquid medicine to flow to dead space department in a flexible way, more abundant washing dead space and discharge air, blood and remaining liquid medicine etc. in the dead space.

5. The remaining needle provided by the invention further comprises a shunting structure which is arranged on the flow guide surface and extends out from the flow guide surface towards the isolating plug. The setting of reposition of redundant personnel structure will follow the liquid reposition of redundant personnel that the water conservancy diversion mouth flows, makes the liquid stream flow along inner chamber inner wall circumference, and the isolation stopper is washed in the contact department of the one end that is close to the pipe and inner chamber inner wall fully for the liquid medicine is more abundant to washing of dead space, can discharge air, blood and remaining liquid medicine etc. in the dead space fast, thoroughly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic cross-sectional view of an indwelling needle of the prior art;

FIG. 2 is a schematic sectional view of an indwelling needle provided in example 1 of the present invention;

FIG. 3 is a partial perspective sectional view of the indwelling needle shown in FIG. 2;

FIG. 4 isbase:Sub>A cross-sectional view A-A of the indwelling needle of FIG. 2, with arrows indicating the direction of flow of the liquid;

FIG. 5 is a schematic sectional view of an indwelling needle provided in example 4 of the present invention;

description of the reference numerals:

1-a catheter seat, 11-a main body, 111-an inner cavity, 12-a side connection pipe, 121-a lumen, 2-a catheter, 3-an isolation plug, 4-a liquid blocking bump, 41-a flow guide surface, 411-a flow guide port, 5-a liquid inlet, 6-a dead space, 7-an extension pipe, 71-a first extension wall, 72-a second extension wall and 8-a shunt shuttle.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

As shown in FIG. 2, the present embodiment provides an indwelling needle comprising a catheter hub 1, a catheter 2, a septum 3 and a liquid-blocking projection 4.

The catheter holder 1 comprises a main body 11 with an inner cavity 111 and a side pipe 12 connected to the side wall of the main body 11 and provided with a lumen 121, wherein the lumen 121 and the inner cavity 111 are arranged at an included angle and communicated at a liquid inlet 5, and one end of the side pipe 12 communicated with the liquid inlet 5 faces the catheter 2.

The catheter 2 is provided at one end of the body 11, and its infusion tube core communicates with the lumen 111.

The isolating plug 3 is accommodated in the inner cavity 111 and is separated from the catheter 2 in the inner cavity 111 at both sides of the communication part between the lumen 121 and the inner cavity 111.

The liquid blocking bump 4 is integrally formed with the inner tube wall of the tube cavity 121 at the liquid inlet 5 of the tube cavity 121 far away from the isolating plug 3, the surface facing the isolating plug 3 is a flow guide surface 41, and the flow guide surface 41 and the liquid inlet 5 are close to the edge of one side of the isolating plug 3 to form a flow guide opening 411. The guiding surface 41 is an arc surface.

When the indwelling needle of the embodiment is used, liquid medicine flows in from the tube cavity 121 of the side connecting tube 12, and is blocked by the liquid blocking bump 4 at the liquid inlet 5, the flow direction is changed, liquid flows into the inner cavity 111 of the main body 11 from the flow guide opening 411 to the isolating plug 3 under the guidance of the flow guide surface 41, and then flows out towards the direction of the catheter 2 after the isolating plug 3 is sprayed, so that the dead space 6 formed between the isolating plug 3 and the inner wall of the inner cavity 111 far away from the liquid inlet 5 can be washed in real time, thereby quickly discharging air, blood, residual liquid medicine and the like in the dead space 6, simultaneously avoiding air, blood, liquid medicine and the like accumulated in the dead space 6, preventing air from entering a human body to cause embolism, preventing coagulated blood at the dead space 6 from being washed into a blood vessel to cause thrombus blockage due to shaking and the like, preventing the residual liquid medicine at the dead space 6 from chemically reacting with the newly input liquid medicine to reduce the efficacy, and greatly improving the life safety of a patient. In addition, the above effects can be achieved only by forming the liquid blocking bump 4 on the inner tube wall of the tube cavity 121, and the structure and the forming are simple, low in cost and easy to achieve.

Referring to fig. 3 and fig. 4, the indwelling needle according to the present embodiment further includes a shunt shuttle 8 disposed on the diversion surface 41 and extending from the diversion surface 41 toward the isolating plug 3, and a gap is formed between the shunt shuttle 8 and an edge of the liquid inlet 5 near the isolating plug 3.

The liquid flowing out of the diversion port 411 is diverted by the diversion shuttle 8, so that the liquid flow flows along the circumferential direction of the inner wall of the inner cavity 111, the isolation plug 3 is fully washed at the contact position of one end close to the catheter 2 and the inner wall of the inner cavity 111, the liquid medicine is more fully used for washing the dead cavity 6, and air, blood, residual liquid medicine and the like in the dead cavity 6 can be rapidly and thoroughly discharged.

The liquid blocking protrusion 4 is not limited to be integrally formed with the inner wall of the lumen 121 in the above embodiments, and may be fixedly connected to the inner wall of the lumen 121 by a snap fit or other connection method.

The shape of the guide surface 41 is not limited to the arc surface in the above embodiment, and may be an inclined surface or a bent surface.

The diverter 8 in the above-mentioned embodiment can be replaced by other diversion bumps, and the diversion bumps with other shapes can also perform the above-mentioned diversion function on the liquid.

Example 2

This embodiment provides an indwelling needle which differs from embodiment 1 in the placement of the liquid-blocking projections 4.

In this embodiment, the liquid blocking protrusion 4 and the inner wall of the inner cavity 111 at the liquid inlet 5 of the inner cavity 111 far from the isolating plug 3 are integrally formed, the surface facing the isolating plug 3 is a flow guiding surface 41, and the flow guiding surface 41 and the liquid inlet 5 are close to the edge of one side of the isolating plug 3 to form a flow guiding opening 411.

Example 3

Referring to fig. 5, the present embodiment provides an indwelling needle which differs from embodiment 1 in that:

the liquid blocking bump 4 in embodiment 1 is not included in this embodiment;

the embodiment further comprises an extension pipe 7 connected to one end of the side connection pipe 12 opposite to the liquid inlet 5, the extension pipe 7 penetrates through the liquid inlet 5 of the side connection pipe 12 and extends into the inner cavity 111, and the part of the extension pipe 7 extending into the inner cavity 111 is a pipe orifice part. The nozzle part is bent towards the isolating plug 3 and comprises a first extension wall 71 formed on the top of the pipe wall at the side far away from the isolating plug 3, and the first extension wall 71 is bent towards the isolating plug 3.

When the indwelling needle of the embodiment is used, a liquid medicine flows in from the extension tube 7 and is blocked by the first extension wall 71 when flowing to the part of the tube opening, the original flowing direction changes, the liquid medicine flows into the inner cavity 111 of the main body 11 towards the isolating plug 3 along the first extension wall 71, the liquid medicine flows out towards the direction of the catheter 2 after being sprayed on the isolating plug 3, the dead space 6 formed between the isolating plug 3 and the inner wall of the inner cavity 111 far away from the liquid inlet 5 can be flushed in real time, air, blood, residual liquid medicine and the like in the dead space 6 can be rapidly discharged, and meanwhile, air, blood, liquid medicine and the like can be prevented from being accumulated in the dead space 6.

Example 4

As shown in fig. 5, the present embodiment provides an indwelling needle which differs from embodiment 3 in that: the nozzle portion further includes a second extension wall 72 formed near the top of the pipe wall on the side of the plug 3, the second extension wall 72 being curved toward the side of the plug 3, the length of the second extension wall 72 being shorter than that of the first extension wall 71.

Through the cooperation of first extension wall 71 and second extension wall 72, can guide liquid medicine to flow to dead space 6 department in a flexible way, more abundant washing dead space 6 and discharge air, blood and residual liquid medicine etc. in dead space 6.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.

Claims

1. An indwelling needle, comprising:

a catheter holder (1) composed of a main body (11) having an inner cavity (111) and a side pipe (12) having a lumen (121) connected to a side wall of the main body (11); the lumen (121) is communicated with the inner cavity (111) at the liquid inlet (5);

a catheter (2) arranged at one end of the main body (11), and an infusion tube core of the catheter is communicated with the inner cavity (111);

the isolating plug (3) is accommodated in the inner cavity (111) and is respectively arranged at two sides of the communication part of the tube cavity (121) and the inner cavity (111) with the catheter (2) in the inner cavity (111), and a dead cavity (6) is formed between the isolating plug (3) and the inner wall of the inner cavity (111) at one side far away from the liquid inlet (5);

the flow guide structure is arranged at the liquid inlet (5) so as to enable liquid flow towards the isolating plug (3) to be formed at the liquid inlet (5) to flush the dead cavity (6); the flow guide structure is a liquid blocking lug (4) arranged on the inner pipe wall of the pipe cavity (121) at one side of the liquid inlet (5) far away from the isolating plug (3), the surface of one side, facing the isolating plug (3), of the liquid blocking lug (4) is a flow guide surface (41), and a flow guide opening (411) is formed by the flow guide surface (41) and the edge of one side, close to the isolating plug (3), of the liquid inlet (5); and

the flow dividing structure is arranged on the flow guide surface (41) and extends out from the flow guide surface (41) towards the isolating plug (3).

2. The indwelling needle according to claim 1, wherein the lumen (121) is angled with respect to the inner lumen (111) and the side connector (12) has one end communicating with the inlet (5) facing the catheter (2).

3. The indwelling needle according to claim 1, wherein the deflector surface (41) is an arc, bevel or bend surface.

4. The indwelling needle according to claim 1, wherein the liquid-blocking lug (4) is integrally formed with the inner tube wall of the lumen (121) at the side of the liquid inlet (5) remote from the septum (3).

5. The indwelling needle according to claim 1, wherein a gap is formed between the shunting structure and the edge of the liquid inlet (5) near the side of the isolating plug (3).

6. The indwelling needle of claim 1, wherein the shunting structure is a shunt shuttle (8).